CN206892712U - A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits - Google Patents
A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits Download PDFInfo
- Publication number
- CN206892712U CN206892712U CN201720887753.8U CN201720887753U CN206892712U CN 206892712 U CN206892712 U CN 206892712U CN 201720887753 U CN201720887753 U CN 201720887753U CN 206892712 U CN206892712 U CN 206892712U
- Authority
- CN
- China
- Prior art keywords
- power supply
- dcdc
- dcdc power
- input
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model is applied to electronic technology field, there is provided a kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits, the DCDC power supply circuits include：DCDC power supply modules and amplification feedback module；Amplify the input voltage of feedback module acquisition electric loading, and when input voltage produces fluctuation, input voltage is adjusted according to feedback voltage for output feedback voltage to DCDC power supply modules, DCDC power supply modules after phase look ahead, enhanced processing and voltage division processing are carried out to input voltage.In the utility model, by when input voltage produces fluctuation, carrying out phase look ahead and enhanced processing to input voltage, the delay of feedback cabling being offset with this, and the degree of control that DCDC power supply circuits fluctuate to load transient can be strengthened, improve the transient response speed of DCDC power supply circuits.
Description
Technical field
The utility model belongs to electronic technology field, more particularly to a kind of mobile terminal, DCDC electric supply installations and its DCDC
Power supply circuit.
Background technology
DCDC power supply circuits refer to that input is direct current (Direct Current, DC), output and the confession of direct current
Circuit.In Practical Project, the output end and the distance between load end of DCDC power supply circuits are distant, and printed substrate
The cabling pressure drop of (Printed Circuit Board, PCB) has reached the degree that can not ignore, especially when DCDC power supply electricity
When the electric current of road output is larger, PCB trace pressure drop can reach several volts, so the voltage ratio DCDC for causing load end power electric
The output end voltage on road is low.In order that obtaining load terminal voltage meet demand, DCDC feeder ears need to obtain load terminal voltage, and pass
The feedback position to take power of system changes inaccurate in DCDC feeder ears, its load terminal voltage for detect.
In order to accurately detect that load terminal voltage changes, currently available technology is positioned close to load by position to take power is fed back
End, however, because this method increases the length of feedback cabling, therefore, when the electric current of load consumption becomes big suddenly or diminishes
When, larger delay will occur for the time that load terminal voltage change feeds back to DCDC feeder ears, and then reduce DCDC power supply electricity
The transient response speed on road.
Therefore, it is necessary to a kind of new technical scheme is proposed, to solve above-mentioned technical problem.
Utility model content
In view of this, the purpose of this utility model is that providing a kind of mobile terminal, DCDC electric supply installations and its DCDC supplies
Circuit, the transient response speed of DCDC power supply circuits can be effectively improved.
The utility model is achieved in that a kind of DCDC power supply circuits, is connected with electric loading,
The DCDC power supply circuits include：
DCDC power supply modules and amplification feedback module；
The output end of the DCDC power supply modules and the input with electric loading and the amplification feedback module
Input is connected, and the output end of the amplification feedback module is connected with the input of the DCDC power supply modules；
The amplification feedback module obtains the input voltage with electric loading, and produces fluctuation in the input voltage
When, carry out exporting after phase look ahead, enhanced processing and voltage division processing feedback voltage to the input voltage to described
The input voltage is adjusted according to the feedback voltage for DCDC power supply modules, the DCDC power supply modules.
Another object of the present utility model, which also resides in, provides a kind of mobile terminal for including above-mentioned DCDC power supply circuits.
In the utility model, DCDC power supply circuits include：DCDC power supply modules and amplification feedback module, amplify feedback module
The input voltage of acquisition electric loading, and when input voltage produces fluctuation, phase look ahead, amplification are carried out to input voltage
Feedback voltage is exported after processing and voltage division processing to DCDC power supply modules, DCDC power supply modules are according to feedback voltage to input electricity
Pressure is adjusted.By when input voltage produces fluctuation, phase look ahead and enhanced processing being carried out to input voltage, with this
The delay of feedback cabling is offset, and the degree of control that DCDC power supply circuits fluctuate to load transient can be strengthened, improves DCDC confessions
The transient response speed of circuit.
Brief description of the drawings
Fig. 1 is the modular structure schematic diagram for the DCDC power supply circuits that the utility model embodiment provides；
Fig. 2 is another modular structure schematic diagram for the DCDC power supply circuits that the utility model embodiment provides；
Fig. 3 is the exemplary circuit figure for the DCDC power supply circuits that the utility model embodiment is provided；
Fig. 4 is the gain versus frequency song for amplifying feedback module in the DCDC power supply circuits that the utility model embodiment is provided
Line schematic diagram；
Fig. 5 is the Phase-Frequency song for amplifying feedback module in the DCDC power supply circuits that the utility model embodiment is provided
Line schematic diagram.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Fig. 1 shows the modular structure for the DCDC power supply circuits that the utility model embodiment provides, for convenience of description, only
The part related to the utility model is shown, details are as follows：
As the preferred embodiment of the utility model one, the DCDC power supply circuits 1 and connected with electric loading 2, and including DCDC
Power supply module 10 and amplification feedback module 12.
Wherein, the output end of DCDC power supply modules 10 is with using the input of electric loading 2 and amplifying the defeated of feedback module 12
Enter end connection, the output end of amplification feedback module 12 is connected with the input of DCDC power supply modules 10.
Specifically, amplification feedback module 12 obtains the input voltage with electric loading 2, and when input voltage produces fluctuation,
Feedback voltage is exported to DCDC power supply modules after phase look ahead, enhanced processing and voltage division processing are carried out to input voltage
Input voltage is adjusted according to feedback voltage for 10, DCDC power supply modules 10.
It should be noted that in the utility model embodiment, because amplification feedback module 12 is in input voltage generation ripple
When dynamic, phase look ahead is carried out to input voltage, therefore, when input voltage fluctuates, amplification feedback module 12 is to input
The process that voltage carries out phase look ahead is that the fluctuation to input voltage carries out phase look ahead, can so be born electricity consumption
The input voltage fluctuation of load 2 is carried out in advance, so as to effectively offset feedback cabling to being made with the input voltage fluctuation of electric loading 2
Into delay.
In the utility model embodiment, by using the DCDC including DCDC power supply modules 10 and amplification feedback module 12
Power supply circuit 1 so that amplification feedback module 12 obtains the input voltage with electric loading 2, and when input voltage produces fluctuation, it is right
Input voltage export after phase look ahead, enhanced processing and voltage division processing feedback voltage to DCDC power supply modules 10,
Input voltage is adjusted according to feedback voltage for DCDC power supply modules 10, and the delay of feedback cabling is offset with this, and can be strengthened
The degree of control that DCDC power supply circuits fluctuate to load transient, improve the transient response speed of DCDC power supply circuits.
Further, Fig. 2 shows the modular structure for the DCDC power supply circuits that another embodiment of the utility model is provided,
For convenience of description, the part related to the utility model embodiment is illustrate only, details are as follows：
As the preferred embodiment of the utility model one, as shown in Fig. 2 amplification feedback module 12 includes amplifying unit 120
With partial pressure feedback unit 122.
Wherein, the input of amplifying unit 120 for amplification feedback module 12 input, the output end of amplifying unit 120
It is connected with the input of partial pressure feedback unit 122, the output end of partial pressure feedback unit 122 is the output end of amplification module 12.
Specifically, amplifying unit 120 obtains input voltage, and when input voltage produces fluctuation, input voltage is carried out
Output is to partial pressure feedback unit 122 after phase look ahead and enhanced processing, and partial pressure feedback unit 122 to locating in advance by phase
Input voltage after reason and enhanced processing exports feedback voltage to DCDC power supply modules 10 after carrying out voltage division processing.
Further specifically, as the preferred embodiment of the utility model one, as shown in figure 3, amplifying unit 120 includes：
Operational amplifier U1, first resistor R1, second resistance R2, the first electric capacity C1 and the second electric capacity C2.
Specifically, operational amplifier U1 first input end is the input of amplifying unit 120, the of operational amplifier U`
First end, second resistance R2 first end, the first electric capacity C1 first end and the second electricity of two inputs and first resistor R1
The first end for holding C2 connects, and first resistor R1 the second end and the first electric capacity C1 the second end are connected to ground altogether, second resistance R2's
Second end connects the output to form amplifying unit 120 altogether with the second electric capacity C2 the second end and operational amplifier U1 output end
End.
It should be noted that in the utility model embodiment, operational amplifier U1 first input end refers to computing
Amplifier U1 negative-phase input, operational amplifier U1 the second input refer to operational amplifier U1 normal phase input end.
Further specifically, as the preferred embodiment of the utility model one, as shown in figure 3, partial pressure feedback unit 122 wraps
Include：
3rd resistor R3 and the 4th resistance R4.
Specifically, 3rd resistor R3 first end is the input of partial pressure feedback unit 122,3rd resistor R3 the second end
Connect the output end to form partial pressure feedback unit 122, the 4th resistance R4 the second end ground connection altogether with the 4th resistance R4 first end.
As the preferred embodiment of the utility model one, as shown in Fig. 2 DCDC power modules 10 include：
DCDC power supply units 100 and energy-storage units 102.
Wherein, the input of DCDC power supply units 100 be DCDC power supply modules 10 input, DCDC power supply units 100
Output end be connected with the input of energy-storage units 102, the output ends of energy-storage units 102 is the output of DCDC power supply modules 10
End.
Specifically, DCDC power supply units 100 receive the feedback voltage that amplification feedback module 12 exports, and according to feedback voltage
The dutycycle of the pulse-width signal to output to energy-storage units 102 is adjusted, to cause energy-storage units 102 to believe according to pulsewidth modulation
Number adjust the output to the input voltage with electric loading 2.
Further, DCDC power supply units 100 receive the feedback voltage that amplification feedback module 12 exports, and the feedback is electric
Pressure adjusts the output to according to comparative result the pulse-width signal of energy-storage units 102 compared with predeterminated voltage
Dutycycle, the regulation to the input voltage with electric loading 2 is realized with this.
Further specifically, as the preferred embodiment of the utility model one, as shown in figure 3, DCDC power supply units 100 wrap
The input for including DCDC chips U2, DCDC chip U2 is the input of DCDC power supply units 100, and DCDC chips U2 output end is
The output end of DCDC power supply units 100.
It should be noted that in the utility model embodiment, DCDC chips U2 can use specific DCDC in the prior art
The chip of translation function is realized, and its concrete operating principle refers to existing DCDC chips, and here is omitted.
Further specifically, as the preferred embodiment of the utility model one, as shown in figure 3, energy-storage units 102 include：
Energy storage inductor L and storage capacitor C3.
Specifically, energy storage inductor L first end is the input of energy-storage units 102, energy storage inductor L the second end and energy storage
Electric capacity C3 first end connects the output end to form energy-storage units 102, storage capacitor L the second end ground connection altogether.
It should be noted that in the utility model embodiment, energy-storage units 102 can also be to exporting extremely with load 2
Input voltage is filtered processing, to eliminate the noise signal in input voltage to being had an impact with electric loading 2.
The operation principle of DCDC power supply circuits is illustrated below in conjunction with Fig. 3, details are as follows：
Firstly, it is necessary to explanation, the module that amplifying unit 120 and partial pressure feedback unit 122 form in Fig. 3 for differential-
Integrating circuit, the input of the derivative-integral circuit are the input voltage with electric loading 2, and the output of the derivative-integral circuit is anti-
It is fed to DCDC chips U2 feedback voltage.
Further, circuit as shown in Figure 3 can obtain, the relation between the input and output of the derivative-integral circuit, i.e.,
The transmission function of the derivative-integral circuit can use below equation to represent：
Wherein, VfbFor the value of feedback voltage, VinFor the value of input voltage, R1 is the resistance of first resistor, and R2 is the second electricity
The resistance of resistance, R3 are the resistance of 3rd resistor, and R4 is the resistance of the 4th resistance, and C1 is the capacitance of the first electric capacity, and C2 is the second electricity
The capacitance of appearance.
Can be zero-sum point according to molecule in transmission function formula after the transmission function of the derivative-integral circuit determines
Mother is the zero zero point Z for respectively obtaining the transmission function0With limit P0Expression formula, wherein zero point Z0Expression formula be：
Limit P0Expression formula be：
Further, it is determined that the transmission function of the derivative-integral circuit and the zero point of the transmission function and limit are public
After formula, reasonable value is carried out to the resistance capacitance in the formula so that zero frequencyLess than pole frequencyWherein, this zero
Dot frequencyAnd pole frequencyComputational methods can be obtained according to transmission function, can also be obtained according to Zero formula and Pole formula
Arrive, regardless of whether being that mode in above two mode, it is prior art, and here is omitted.
After the transmission function of the derivative-integral circuit and the zero point of the transmission function and Pole formula is obtained, according to
The zero point and Pole formula of the transmission function and the transmission function can determine that the gain-frequency curve of the derivative-integral circuit
(as shown in Figure 4) and Phase-Frequency curve (as shown in Figure 5).
Specifically, please also refer to Fig. 3 and Fig. 4, because integrating circuit is when input changes, output is just had, because
This, when being fluctuated with the input voltage of electric loading 2, the derivative-integral circuit, will according to the Phase-Frequency curve of itself
In zero frequencyAnd pole frequencyBetween frequency range phase it is advanced, i.e., the derivative-integral circuit can be to electric loading 2
Input voltage fluctuation carries out advanced, delay caused by offsetting long cabling with this；In addition, please also refer to Fig. 3 and with reference to figure 5, root
Understood according to the gain-frequency curve of the derivative-integral circuit, in zero frequencyThe frequency stage, the derivative-integral circuit
Gain is more than 1, i.e. the derivative-integral circuit can be amplified processing to the fluctuation of input voltage, strengthen DCDC chips U2 with this
To the degree of control of the transient wave of the input voltage with electric loading 2.
In the utility model embodiment, derivative-integral circuit can to fluctuated caused by the input voltage of electric loading 2 into
Row phase look ahead, while gain amplification disposal can be carried out to the fluctuation caused by the input voltage of electric loading 2, eliminated with this
Wire delay is walked, while strengthens the degrees of control of the DCDC chips U2 to the transient wave of the input voltage with electric loading 2, and then is lifted
Transient response speed.
Further, when the derivative-integral circuit, to being carried out with the input voltage of electric loading 2, phase is advanced and enhanced processing
Afterwards, the derivative-integral circuit can carry out voltage division processing to the input voltage again, to cause input to DCDC chips U2 feedback
The input voltage that voltage more levels off to electric loading 2.And DCDC chips U2 is after the feedback voltage is received, by the feedback voltage
Increase or reduce output to energy storage inductor L signal compared with the input voltage of electric loading 2, and according to comparative result
Dutycycle, with cause energy storage inductor L increase or reduce output to use electric loading 2 input voltage, so as to realize to electricity consumption
The dynamic regulation of the input voltage of load 2.
Further, the application advantage based on above-mentioned DCDC power supply circuits 1, the utility model additionally provide a kind of including upper
State the DCDC electric supply installations of DCDC power supply circuits 1.
Further, the utility model additionally provides a kind of mobile terminal for including above-mentioned DCDC electric supply installations, the movement
Terminal can be the terminals such as mobile phone, tablet personal computer, be not specifically limited herein.
In the utility model embodiment, DCDC power supply circuits include：DCDC power supply modules and amplification feedback module, amplification are anti-
The input voltage of module acquisition electric loading is presented, and when input voltage produces fluctuation, phase is carried out to input voltage and located in advance
Feedback voltage is exported after reason, enhanced processing and voltage division processing to DCDC power supply modules, DCDC is according to feedback voltage to input electricity
Pressure is adjusted.By when input voltage produces fluctuation, phase look ahead and enhanced processing being carried out to input voltage, with this
The delay of feedback cabling is offset, and the degree of control that DCDC power supply circuits fluctuate to load transient can be strengthened, improves DCDC confessions
The transient response speed of circuit.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of DCDC power supply circuits, it is connected with electric loading, it is characterised in that the DCDC power supply circuits include：
DCDC power supply modules and amplification feedback module；
The output end of the DCDC power supply modules and the input of the input with electric loading and the amplification feedback module
End connection, the output end of the amplification feedback module are connected with the input of the DCDC power supply modules；
The amplification feedback module obtains the input voltage with electric loading, and when the input voltage produces fluctuation, it is right
The input voltage export after phase look ahead, enhanced processing and voltage division processing feedback voltage and powered to the DCDC
The input voltage is adjusted according to the feedback voltage for module, the DCDC power supply modules.
2. DCDC power supply circuits according to claim 1, it is characterised in that the amplification feedback module includes：
Amplifying unit and partial pressure feedback unit；
The input of the amplifying unit for it is described amplification feedback module input, the output end of the amplifying unit with it is described
The input connection of partial pressure feedback unit, the output end of the partial pressure feedback unit are the output end of the amplification module；
The amplifying unit obtains the input voltage, and when the input voltage produces fluctuation, the input voltage is entered
Output is to the partial pressure feedback unit after row phase look ahead and enhanced processing, and the partial pressure feedback unit by phase to surpassing
Input voltage after pre-treatment and enhanced processing exports the feedback voltage to the DCDC power supply modules after carrying out voltage division processing.
3. DCDC power supply circuits according to claim 2, it is characterised in that the amplifying unit includes：
Operational amplifier, first resistor, second resistance, the first electric capacity and the second electric capacity；
The first input end of the operational amplifier is the input of the amplifying unit, and the second of the operational amplifier inputs
End and the first end of the first resistor, the first end of the second resistance, the first end of first electric capacity and described the
The first end connection of two electric capacity, the second end of the second end of the first resistor and first electric capacity are connected to ground altogether, and described the
Second end of two resistance connects to form described put altogether with the second end of second electric capacity and the output end of the operational amplifier
The output end of big unit.
4. DCDC power supply circuits according to claim 2, it is characterised in that the partial pressure feedback unit includes：
3rd resistor and the 4th resistance；
The first end of the 3rd resistor be the partial pressure feedback unit input, the second end of the 3rd resistor with it is described
The first end of 4th resistance connects the output end to form the partial pressure feedback unit, the second end ground connection of the 4th resistance altogether.
5. DCDC power supply circuits according to claim 1, it is characterised in that the DCDC power modules include：
DCDC power supply units and energy-storage units；
The input of the DCDC power supply units be the DCDC power supply modules input, the output of the DCDC power supply units
End is connected with the input of the energy-storage units, and the output end of the energy-storage units is the output end of the DCDC power supply modules；
The DCDC power supply units receive the feedback voltage of the amplification feedback module output, and are adjusted according to the feedback voltage
To output to the dutycycle of the pulse-width signal of the energy-storage units, to cause the energy-storage units according to the pulsewidth modulation
Signal Regulation is exported to the input voltage with electric loading.
6. DCDC power supply circuits according to claim 5, it is characterised in that the DCDC power supply units include DCDC cores
Piece, the input of the DCDC chips are the input of the DCDC power supply units, and the output end of the DCDC chips is described
The output end of DCDC power supply units.
7. DCDC power supply circuits according to claim 5, it is characterised in that the energy-storage units include：
Energy storage inductor and storage capacitor；
The first end of the energy storage inductor is the input of the energy-storage units, the second end of the energy storage inductor and the energy storage
The first end of electric capacity connects the output end to form the energy-storage units, the second end ground connection of the storage capacitor altogether.
8. a kind of DCDC electric supply installations, it is characterised in that the DCDC electric supply installations are included such as any one of claim 1 to 7 institute
The DCDC power supply circuits stated.
9. a kind of mobile terminal, it is characterised in that the mobile terminal includes DCDC electric supply installations as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720887753.8U CN206892712U (en) | 2017-07-20 | 2017-07-20 | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720887753.8U CN206892712U (en) | 2017-07-20 | 2017-07-20 | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892712U true CN206892712U (en) | 2018-01-16 |
Family
ID=61297329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720887753.8U Expired - Fee Related CN206892712U (en) | 2017-07-20 | 2017-07-20 | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206892712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168445A (en) * | 2017-07-20 | 2017-09-15 | 广东欧珀移动通信有限公司 | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
-
2017
- 2017-07-20 CN CN201720887753.8U patent/CN206892712U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168445A (en) * | 2017-07-20 | 2017-09-15 | 广东欧珀移动通信有限公司 | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits |
| CN107168445B (en) * | 2017-07-20 | 2019-03-01 | Oppo广东移动通信有限公司 | A kind of mobile terminal, DCDC power supply unit and its DCDC power supply circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102035366B (en) | Power supply device | |
| US20120112719A1 (en) | Rectifier circuit | |
| CN104426558B (en) | Radio frequency transmitter and electronic device | |
| CN104063003B (en) | A kind of low-power consumption of integrated slew rate enhancing circuit is without the outer electric capacity LDO of sheet | |
| CN102055313B (en) | Power factor correction control device in fixed frequency constant on time current make-and-break mode | |
| CN101893908A (en) | Filling in/pulling out current rapid response linear voltage regulator and regulating method | |
| CN201230276Y (en) | Synchronous peak value current control mode impulse-width modulation DC/DC converter | |
| CN103683933A (en) | Non-reverse-buck-boost dual-purpose direct current-to-direct current digital control system | |
| CN108768174B (en) | Analog-digital mixed multiphase staggered parallel power converter | |
| CN102324847B (en) | Reduced-voltage DC-DC (Direct Current-Direct Current) converter with current mode frequency compensating device | |
| CN203504410U (en) | DC-DC converter | |
| CN107168445B (en) | A kind of mobile terminal, DCDC power supply unit and its DCDC power supply circuit | |
| CN109871059A (en) | A kind of ultra low voltage LDO circuit | |
| CN206892712U (en) | A kind of mobile terminal, DCDC electric supply installations and its DCDC power supply circuits | |
| CN103414323A (en) | Circuit for reducing turn-on time of current control type switch adjusting system | |
| CN103414333B (en) | A kind of active power factor correction controller | |
| CN108683335A (en) | A kind of staggeredly Buck and the full-bridge circuit of one circle control strategy | |
| CN101997313A (en) | In-parallel compound filter | |
| CN102237786B (en) | Power conversion system for reducing cross regulation effects and power control method | |
| CN1116731C (en) | Method and device for suppressing ripples for high-power DC power supply | |
| CN203883674U (en) | Light-load switching power supply chip | |
| CN204425181U (en) | A kind of multi-channel portable D.C. regulated power supply | |
| CN204740524U (en) | Power line carrier communication line driver based on switching power supply constant power control | |
| CN202978686U (en) | Buck converter circuit | |
| CN208174535U (en) | A kind of small ripple hop cycle control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |